Astronomers tighten expansion rate gap in universe measurements

Los Angeles CA (SPX) Dec 05, 2025

A team of astronomers using several ground and space-based observatories, including the W. M. Keck Observatory on Maunakea, has produced one of the most precise independent measurements yet of the universe’s current expansion rate, intensifying the long-running Hubble tension in cosmology.

The researchers drew on data from Keck’s Cosmic Web Imager together with observations from NASA’s Jam